No, libprofile (a library that can be used to switch profiles, get the name of the current profile, etc.) is closed-source, yes, but the headers are available (in the nokia-binaries repo) so a person can write a program that changes the current profile.

I actually wrote a 3 line \"program\" (using libprofile) that just switched between the General and Silent programs depending on what profile it was currently in (needed a one-click toggle on my desktop...).